Metal window screen



F. F. HASKELL METAL-WINDOW SCREEN June 16, 1931.

Filed Dec. 18, 1928 lnven'Ter. Frederick F. H-asKe H b ywwz the frame are formed by 45 the frame I Patented June 165 1931 um D'.s1-A s: .PATNT O'FEIE :i

FREDERICK- 1*. HASKELL, OF ARLINGTON, .MASSACHUSETTS; ASSIGNOR TO APEXEDN COMPANY, OF JAMAICA PLAIN,.MASSACHUSETTS,-A CORPORATION OF. MASSACHU- SETTS METAL wmnowscnnniv Application filed. December is. 1928., Serial no. 326,873.

This invention relates to metal window screens. Some of the desirable characteris tics of a metal window screen are that it should be light in weight and the sides of 5 the frame should have as small a cross-sectional area as possible consistent withthe strength and rigidity required of the frame.

Meta-l window screens are now frequently made with hollow sides, that is, the sides of bending or folding sheet metal into the desired shape. Such a frame can be made relatively light and it has the desired stiffness and rigidity but the cross-sectional area of the frame is necessarily '15 of dimensions larger than desirable. A window screen having a frame with solid sides would be unduly heavy if made of iron,

bronze or similar metal.

My invention has for its object to provide 20. a novel metal window screen whichhas the desirable characteristics of being bothlight in weight and of the required rigidity and stiffness. I secure a window screen of light weight by making the frame of a light weight metal such as aluminum and 'I secure the desirable small cross-sectional area of the sides of the frame by making said sides solid.

The foursides of the frame are integrally connected at the corners and in order to give 30. added stifiness and rigidly to the. frame so that it will not warp or twist I'so construct the frame that the material at the corners thereofis harder and more rigid than: at other parts of the'frame. In arectangular frame, such as the frame for a window screen,

the resistance to the warping ,or twisting of the frame is derived largely from the metal at frame the metal at'these points is made stiffer and more rigid than in the body of the'sides now be described after which the novel features will be pointed outin the appended claims. v

Fig. 1 is a view of a window screen embodying my invention;

Fig. 2 is an enlarged detail view of one corner of the screen;

having the four sides 2 which are integrally connected at. the corners 3, and the wire screenl which is attached to the frame 1.

In the construction herein shown the sides 2 of the frame 1 are provided with grooves 5,111 which the edges 6 of the wire screen 4 are c c so The window screen comprlses the framel received. These edges Glare locked in the grooves by. means of locking keys 7 which are forced into thergrooves 5,

The sides 2 are made of aluminum or aluminum alloy and are solid in cross section. 'A window screenmade of an aluminumproduct has" the advantage of being light in weight a and by making the sides 2 solid they can be made of the desirable small cross-sectional of the frame lare specially treated so as to in-' crease the strength ofthe frame at these points; This treatment is'in the nature ofa heat treatment. When aluminum alloy containing small amounts of one or more of such mgredients as copper, manganese magneslumj or silicon, is heated toapproximately welding temperature and then is cooled, its stiffness and rigidity is increased, the increase I the Corners ofthe frame and in my improved continuing for several days after the heating and cooling operation. V, v

'In making the windowscreen in accord- 'ance' with my invention I weld together the four sides of the fr'ame at the corners and the welding operation is so carried out as to produce the added stiffness and rigidity at the corners as above described. A-scren frame thusmade is one which is light in weight and thesides of which have small. cross-sectional area but which is nevertheless of sufficient stiffness and rigidity at the, corners so that it will not twist or warp.

In the drawings the portion of the material of the screen at the corners thereof which is made stiff and rigid is indicated by the stipled area 14.

The window screen is provided with suitable handles. These are shown at 8 and each is provided with a handle portion 9 and the two arms 10. The arms and handle portion may be made from a blank of sheet metal which is shaped to form the tubular handle portion 9 and arms 10. Each arm is formed at its lower end with a circular portion 11 which sets in a recess 12 formed in the bottom rail of the frame so that the arms will come flush with the face of the frame. These arms aresecured to the frame by means of rivets 13 which extend into the grooves 5 and are. therefore, concealed on the front of the frame by the locking bead 7.

In forming the handle the blank is bent so that the tubular handle portion 9 will stand inside of the arms 10 so that the handle will present no obstacle which extends outwardly from the back face of the screen. By means of this construction the handle presents no obstruction to the free up and down movement of the screens.

I claim.

1. A window screen comprising a frame of aluminum alloy having integrally-connected sides and a wire screen secured to said sides, the material of the frame at the corners thereof being stiffer and more rigid than at the other portions of the frame.

2. A window screen comprising a metal frame having integrally-connected sides which are solid in cross section and each of which is grooved, a wire screen having its edges received in the grooves, locking keys occup ing the grooves and retaining therein the e ges of the wire screen, handles for the screen each comprising a handle portion and arms of sheet metal extending therefrom, each arm terminatin in a circular foot portion, the face of t e screen opposite the grooved face being provided with circular recesses tofreceive said foot portions, which recesses are so positioned that the centers thereof are directly opposite the groove, and rivets extending centrally through the feet for connecting said feet to the screen frame, one en, of each rivet occupying the groove in the frame and thus being concealed by the locking key.

3. A window screen comprising a frame of aluminum alloy, the four sides of which are welded together at the corners, the material of the frame at the corners where the sides are welded together being stiffer and more 'd than, at other portions of the frame 11 testimony whereof, I have signed my name to this s ecificatio DERIOK F. HASKELL. 

